Study on air pollution abatement efficiency of China by using DEA

Taking the number of waste gas treatment facilities and its operation cost as the inputs, with the outputs of the abatement amount of industrial sulfur dioxide, industrial smoke and industrial dust, super-efficiency DEA model was applied to study the efficiency of air pollution abatement in China's 29 provinces from 2004 to 2009. The results show that there was no significant change in the pattern of the abatement efficiency among the provinces during our studied period. The provinces in the central region, such as Jiangxi and Inner Mongolia, had relatively high air pollution control efficiency. The provinces in the eastern region, such as Beijing and Tianjin, and in the western region, like Sichuan and Xinjiang, had relatively low efficiency. China should increase air pollution control investment in the central and western regions in order to improve air pollution control efficiency.